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using System;
using System.Collections.Specialized;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using Microsoft.AspNetCore.Mvc;
using StardewModdingAPI.Toolkit.Utilities;
using StardewModdingAPI.Web.Framework;
using StardewModdingAPI.Web.Framework.LogParsing;
using StardewModdingAPI.Web.Framework.LogParsing.Models;
using StardewModdingAPI.Web.Framework.Storage;
using StardewModdingAPI.Web.ViewModels;
namespace StardewModdingAPI.Web.Controllers
{
/// <summary>Provides a web UI and API for parsing SMAPI log files.</summary>
internal class LogParserController : Controller
{
/*********
** Fields
*********/
/// <summary>Provides access to raw data storage.</summary>
private readonly IStorageProvider Storage;
/*********
** Public methods
*********/
/***
** Constructor
***/
/// <summary>Construct an instance.</summary>
/// <param name="storage">Provides access to raw data storage.</param>
public LogParserController(IStorageProvider storage)
{
this.Storage = storage;
}
/***
** Web UI
***/
/// <summary>Render the log parser UI.</summary>
/// <param name="id">The stored file ID.</param>
/// <param name="format">How to render the log view.</param>
/// <param name="renew">Whether to reset the log expiry.</param>
[HttpGet]
[Route("log")]
[Route("log/{id}")]
public async Task<ActionResult> Index(string? id = null, LogViewFormat format = LogViewFormat.Default, bool renew = false)
{
// fresh page
if (string.IsNullOrWhiteSpace(id))
return this.View("Index", this.GetModel(id));
// fetch log
StoredFileInfo file = await this.Storage.GetAsync(id, renew);
// render view
switch (format)
{
case LogViewFormat.Default:
case LogViewFormat.RawView:
{
ParsedLog log = file.Success
? new LogParser().Parse(file.Content)
: new ParsedLog { IsValid = false, Error = file.Error };
return this.View("Index", this.GetModel(id, uploadWarning: file.Warning, expiry: file.Expiry).SetResult(log, showRaw: format == LogViewFormat.RawView));
}
case LogViewFormat.RawDownload:
{
string content = file.Error ?? file.Content ?? string.Empty;
return this.File(Encoding.UTF8.GetBytes(content), "plain/text", $"SMAPI log ({id}).txt");
}
default:
throw new InvalidOperationException($"Unknown log view format '{format}'.");
}
}
/***
** JSON
***/
/// <summary>Save raw log data.</summary>
[HttpPost, AllowLargePosts]
[Route("log")]
public async Task<ActionResult> PostAsync()
{
// get raw log text
// note: avoid this.Request.Form, which fails if any mod logged a null character.
string? input;
{
using StreamReader reader = new StreamReader(this.Request.Body);
NameValueCollection parsed = HttpUtility.ParseQueryString(await reader.ReadToEndAsync());
input = parsed["input"];
if (string.IsNullOrWhiteSpace(input))
return this.View("Index", this.GetModel(null, uploadError: "The log file seems to be empty."));
}
// upload log
UploadResult uploadResult = await this.Storage.SaveAsync(input);
if (!uploadResult.Succeeded)
return this.View("Index", this.GetModel(null, uploadError: uploadResult.UploadError));
// redirect to view
return this.Redirect(this.Url.PlainAction("Index", "LogParser", new { id = uploadResult.ID })!);
}
/*********
** Private methods
*********/
/// <summary>Build a log parser model.</summary>
/// <param name="pasteID">The stored file ID.</param>
/// <param name="expiry">When the uploaded file will no longer be available.</param>
/// <param name="uploadWarning">A non-blocking warning while uploading the log.</param>
/// <param name="uploadError">An error which occurred while uploading the log.</param>
private LogParserModel GetModel(string? pasteID, DateTimeOffset? expiry = null, string? uploadWarning = null, string? uploadError = null)
{
Platform? platform = this.DetectClientPlatform();
return new LogParserModel(pasteID, platform)
{
UploadWarning = uploadWarning,
UploadError = uploadError,
Expiry = expiry
};
}
/// <summary>Detect the viewer's OS.</summary>
/// <returns>Returns the viewer OS if known, else null.</returns>
private Platform? DetectClientPlatform()
{
string userAgent = this.Request.Headers["User-Agent"];
switch (userAgent)
{
case string ua when ua.Contains("Windows"):
return Platform.Windows;
case string ua when ua.Contains("Android"): // check for Android before Linux because Android user agents also contain Linux
return Platform.Android;
case string ua when ua.Contains("Linux"):
return Platform.Linux;
case string ua when ua.Contains("Mac"):
return Platform.Mac;
default:
return null;
}
}
}
}
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